@article{IIGUM_2016_18_a0,
     author = {Yu. N. Artamonov},
     title = {Group choice using matrix norms},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {3--20},
     publisher = {mathdoc},
     volume = {18},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2016_18_a0/}
}